Achieving Groundwater Resource Sustainability at Watershed Scale by Conjunctive Use of Groundwater and surface Resources

摘要

The main goal of paper is to identify optimal water resources management strategies for groundwaterresources sustainability achievement in Maharlou-Bakhtegan watershed in Iran and maximum water supply probability tothe demand sites. In the present study, conjunctive use of groundwater and surface resources along with a scenario-basedanalysis approach is examined to achieve the optimal water resource management and plan Maharlou-Bakhteganwatershed using MODSIM model as a decision support system (DSS) for the basic river catchment management. Theproposed approach is used to assess the effects of the different management strategies, climate changes, groundwaterwithdrawal levels and irrigation efficiency on the groundwater resources sustainability, agricultural water supply, andenvironmental water demand satisfaction. To quantify the system performance, six management scenarios are defined andmodelled by MODSIM. For assessment of the system performance in each scenario, three performance indicatorsincluding reliability, vulnerability, and resiliency are introduced and defined. The findings showed that the fifth scenario(SC5) strategies satisfied all of the considered management goals and proposed the optimal management solutions forsustainability achievement of the groundwater resources.